Gallon-Liter Converter

Real-time conversion between US/UK gallons, liters, pints, quarts and more.

Conversion Factors

1 US Gallon = 3.785 L 1 UK Gallon = 4.546 L 1 US Quart = 0.946 L 1 US Pint = 473 mL 1 Fluid Ounce = 29.6 mL 1 Liter = 0.264 US gal

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Difference Between Gallons and Liters

Gallon is a volume unit used in the United States and United Kingdom, but the two countries use different gallon sizes. US gallon is 3.785 liters, while UK/Imperial gallon is 4.546 liters. The US gallon is about 17% smaller than the UK gallon.

Gallon-Liter Conversion Formulas

The formula to convert US gallons to liters is L = US gal × 3.785411784. The exact conversion factor is 3.785411784, but 3.785 is commonly used in daily life. 5 US gallons equals 5 × 3.785 = 18.925 liters.

Relationship of Quarts, Pints, and Ounces

In the US volume system, 1 gallon = 4 quarts, 1 quart = 2 pints, 1 pint = 16 fluid ounces (fl oz). Therefore, 1 gallon = 8 pints = 128 fluid ounces.

Vehicle Fuel Capacity and MPG Calculation

US vehicle fuel tank capacity is displayed in gallons. Compact cars typically have 12-15 gallons (45-57 liters), mid-size sedans 15-18 gallons (57-68 liters), and SUVs 18-26 gallons (68-98 liters).

Questions fréquentes

Why are US and UK gallons different sizes?

The two units come from different historical standards: the US gallon is based on the old wine gallon, while the UK gallon is the Imperial gallon. The US gallon (3.785 L) is about 17% smaller than the UK gallon (4.546 L).

How do I convert MPG to liters per 100km or km/L?

Use km/L = MPG × 0.425 to get kilometers per liter, or divide 235.2 by MPG to get liters per 100 km. For example, 30 MPG is roughly 12.75 km/L.

How many liters are in a gallon?

A US gallon is about 3.785 liters, while a UK (Imperial) gallon is about 4.546 liters. Always check which gallon you mean before converting, since the difference is significant.

What is a US cup in milliliters?

A US cup equals 8 fluid ounces, or about 237 mL. This differs from the metric cup (250 mL) used in some countries, so recipe conversions may need slight adjustment.

Is a pint the same everywhere?

No. A US pint is 16 fl oz (about 473 mL), while a UK/Imperial pint is 20 fl oz (about 568 mL). Check which standard a pub or recipe is using before converting.